Abstract: Multicategory land use data of high spatiotemporal resolution and large scale are crucial for studying regional ecological and environmental changes and urbanization impacts as well as for ...

Abstract: The trajectory planning for spacecraft formation reconfiguration (SFR) presents significant technical challenges due to its time-optimal performance index, highly nonlinear terminal ...

The acting head of the DOJ’s voting section told a judge last week that the agency had not touched the nonpublic voter roll data it has collected. That wasn’t true. “We have not done anything yet,” ...

I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those experiences to help students improve in math through practical applications and tips.